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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. When are dairy cattle dehorned?






2. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






3. 14-19 (17) days






4. Prevent the cow from getting an infection from the calve






5. 19-23 (21) days






6. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






7. What about the sperm for a bull which has been castrated but still has testicles?






8. 19-23 (21) days






9. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






10. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






11. Important 'landmark' during palpation






12. 30 hours after estrus begins






13. Male on one pin and female on other side






14. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






15. Sperm is produced here






16. (LH) stimulates the Leydig cells to produce testosterone






17. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






18. Why does estrus happen before ovulation?






19. 336 days






20. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






21. 45-60 days after breeding; re-breed as required






22. Check feet and legs - look for masculine traits in build such as crest and muscling






23. Start of the reproductive tract for the female. located outside of the body






24. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






25. Scar tissue plugs up chambers of udder






26. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






27. 147 days






28. Animals which have many estrous periods per year (ex: cow - sow)






29. ~305 days (altough often longer due to breeding difficulties)






30. ~60 days before calving






31. Allows extension of penis without fibro-elastic penis






32. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






33. Front feet and head first. (except for hogs and dogs)






34. Produce testosterone. located between the seminiferous tubules






35. FEED






36. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






37. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






38. 1-2 days






39. 14-19 (17) days






40. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






41. Male on one pin and female on other side






42. What helps regulate spermatogenesis?






43. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






44. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






45. 24 hours before end of estrus cycle






46. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






47. What makes the milk flow through the mammary glands?






48. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






49. Luteolysis happens because of the ____________ hormone






50. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.